Scale



Lemans' July 26 1927.

F. B. HAMBLEN SCALE Filed July 22,

F. B. HAMBLIN JuIy 26, 1927'.

l SCALE Filed July 22. 1926y 2 Sheets-Sheet 2 n Patented July 26, 19217.

"UNITEfDpISrATiESj QFFICE..

FRED B- HAMBLIN, Meer# @eine Naseem, ASsIsNOs ,resHE weresroearn CoM-v BANY, 0F srl LOUIS, MLSSOURI, e @meneame O F lirrsserna-y sens..

Applieation med my 22, 192s. serial No. 124,162'.

This invention relates to improvements in scales and moreparticularly a scale adapte ed )for weightduplication.

vAn object of the invention is to provide a scale with improvedme'ans for indicating over and under `weight from anormal predetermined ii'eight.'

' Another object'of the invention is to provide a scale with an adjusting mechanism to hold theoperation of thescale within a predetermined weight Zone.

Additional advantages of the structure will be apparent 'from the 'following detailed description thereof, taken in connection with the .accompanying drawings in which, y j

. Fig. l is a front view of ,the operating mechanism with the front plate ofthe scale housing removed.

is a view of the Ascreen frame upon which ,the scale chart' is projected. Y

Fig. .3 is a detail view ot the pointer device'used in connection with the `scale as a centering indicator. i f

Fig. et is a fragmentary view chart. V

Eig.` `is'a view of the adjusting mechanism for determining the range o throw of the scale beam. i Y' i f In the embodiment of the invention illustrated in the drawing, the scale is kshown as including a scale housing l. ithin the housingy and pivoted'tor rocking `movement is the main scale beam 2,',the action of which is controlled kby ac'dash pot 3.

Hangers l `suitably Aconnected with the scale housing provide means for supporting a shaft 5 upon which an Veccentric hub 6 is-mounted and a pendulum 7 is connected to the hub 6. Extending laterally from the hub 6 is' an arm 8 that adjustably supports a chart frame 9, the chart iframe 9 having a cylindrical extension l() that lits into an opening in the end ot' the arm x8 with which it is' lfrictionally connected by'a clamped nut 11 for centering the chartr and holding it in its'proper adjustment'.

A chartfl2 is removably .supportedin the chart holder or frame i) landgthe vindicia on the chart are magniiied and projected onto a ground glass panel 13 carried in a spring frame lll ,which is a part of vthe front'plate ot the scale housing.` It will vbe understood that the chart indicia are projected ,to the screen by a lens system, the condensing lens Aof the scale being shown-in Fig. 1 of the drawing in dotted llines 15, theprojecting lens being in a plane `forward of the chart and between the chart andthe-panel 13.

The oscillating movement ot the scale beam 21induced by the-weight is translated to an arcuate movement of the chart by means'of a connection comprising a stirrup 16, a rod 17 and a flexible band 18 operating over the face of the eccentric hub 6.

4The' structure of the scale thus Yfar described comprises known subject matter and is nota partei' thel present' invention. AThe present invention has to do with the limitatin'otI the extent of movement or' the main scale beam 2 to hold it within a predetermined weight rone and also tothe means of projecting distinctive indica-tions for determining over andV underweigh't Vfrom a predetermined weight indication.

The means 'for determining the'eXtent oit oscillation of the main scale beam 2 comprises a screw 19 supported by a bracket'() projecting -inwardly from a yside wall ot `the scale housing, which screw is provided with an abutment or head 21 in a plane above a rod 22- that extends at right angles romthe opter extremity of the scale beam and another screw 23, the end ot which is below the abutment22. The abutment'22, in the embodiment illustrated,.comprises a connection with a tare beam (not shown) but it will be understood that any i'orm of abutment connected to the main beam may be utilized. Y

'The screws 19. and 23 are provided with linnrled ends Y2li and 25 respectively and jam-nuts 26 and 27. By adjusting the interval between the top face of the screw 23 and the underface ofthe head 21, the range ofv movement ogt 'the scale beam may be determined, thus holding the movement oll the scale beam that results in a movement of the scale 4chart within a predetermined range.

The screen Aupon which the chart is proi jected comprises one sect-ion 28 ot' ground glass or other translucent material for receiving the `image of the chart projected theieto. At one side of ,thescale in ven tical alinement are two distinctive screen sections 29 and Y3,0 composed ojlI vari-colored glass so as to provide distinctive display zones for the over and `underweight indica tions.

Back of the panels 29 andr 30 and extend ing over the adjacent marginal ,edge of the panel 28 is an adjustable indicating pointer comprising a threaded shank 31 that projects through the side wall of the scale housing, said shank being adjustable longitudinally by reason of its threaded engagement with the opening through which ,it projects. A jam-nut 32 is provided on the outer extremity of the shank to lock the shank in proper adjustment.

Extending inwardly from theinner end of the shank is a rod 33 havin its inner extremity pointed Vto form an in icating arrowfor coo eratin with the,scale chart to afford a sca e reading. The rod 33 carries two discs or spherical members 34v and 35, t-he member 34 being of a slightly less diameter than the diameter of the member 35.

The scale chart is provided withindicia comprising a weight indicating scale 36 arranged in vertical sequence, and at predetermined points on the scale are provided openings or windows 37 and 38 throuvh which beams of light in alinement with the predetermined scale line are projected toward the screen. In centering the indicator, the member 35 is arranged within the` marginal edge of the vertical panels 29 and 30 and the member 34 is arranged within-the area of the screen panel 28 adjacent to the line between the distinctive panels and the said panel 28.

When the beams of light paing through the openings 37 and 38 in the scale chart and the end of the pointer centers at the predetermined scale line. the members 34 and 35 mask the light rays and prevent any indication reachin the screen. VWhenever thev chart varies rom the predetermined weight either by an over or under movement, the unmasked portion of the beams will throw a ray over orY under the members 34 and 35, which rays illuminate an area either in the underweight panel 29 or the overweight panel 30 and also in the marginal area of the panel 28 adjacent to the area upon which the scale chart is projected. It is thus possible for the opera-tor to receive an indication of a slight variation from the normal weight and to determine the exact extent of the over or underweight by the position of the shadow cast by the member 34 and the end of the pointer and to receive a distinctive indication by the illumination of an area in the vari-colored panels 29 and 30.

The scale may, therefore, be used for rapid duplicating work for multiple-weighings of predetermined weights. It will beunderstood that the adjustment may be made so that the range within predetermined Weight zones may be accomplished.

It is thus seenA that the construction disclosed actually accomplishes the stated objects and purposes and that it has a wide `of 'thecapacity' of the scale.

`vI am aware that the invention may be .modified in various particulars without depaitin Afrom therspirit and scope thereof, but wiiat I claimand desire to secure by Letters Patent is:

1. Ink a scale, the combination with a weighing mechanism, of ka screen having a scale image reoeivi zone and distinctively marked zones to in lcate 'over and under- Weight, a chart having scale indications, means coordinated with the scale indications for displaying an indication in the over and underweight zones of. the screen and a pointer device located between the chart and the screen for centering the scale on the chart and for coo rating with the means on the chart for indicatin the over and underweight operations of t e chart.

2. In a scale, the combination with weighing mechanism, of a screen having over and underweight zones, a chart responsive to loads and having openings for projected rays of light, means for projectin the chart on the screen, and a pointer device located between the chart and the screen arranged to obstruct light rays through said o eni to give a normal indication when t e inter centers with a predetermined scale indication of the chart.

3. In a scale, the combination of wei hing mechanism, a screen, a chart having istinctive over and underweight zones, means for projecting the chart on -the screen and `for causingva direct ray in alinement with the distinctive zones, and a pointer located between the chart and the screen for masking thelight rays projected from the chart and to center the direct ray to 've a neutral indication when a load moves t e chart to a predetermined position and to permit said direct ray to be projected into one or the other of said distinctive zones when the normal position of the chart is moved therefrom in either direction.

4. In a scale, the combination with weighing mechanism, of a screen, a chart having a weight scale thereon and an opening therethrough in alinement with a redetermined scale line, a device intermediate the chart and the screen obstructing said openin and centering a normal scale line and permitting a direct ray to pass through said o ening into either one or the other of said istinctive zones when the normal weight is exceeded orv diminished.

5. In a scale, the combination with a weighing mechanism, of a screen having a scale image receivin zone and distinctively marked zones to in icate over and underweight, a chart having scale indications, means coordinated with the scale indications for displaying an indication in the over and underweight zones of the screen, a pointer device located between the chart and the screen for centering the scale on the chart and for cooperating With the means on the chart forL indicating'l the over and underweight operations of the chart, and adjustable means 'for limiting the extent of movement of the Weighing mechanism.

6. In a scale, the combination with Weighing mechanism, of a screen having over and undernf'eight Zones, a chart responsive to loads and having openings for projected rays of light, means for projecting the chart on the screen, a pointer device located between the chart and the screen arranged to obstruct light rays through said openings to give a normal indication when the pointer centers with a predetermined scale indication of the chart, and adjustable means for limiting the extent of movement of the Weighing mechanism. n y

7. In a scale, the combination of weighing mechanism, a screen, a chart having distinctive over and underweight zones, means for projecting the chart on the screen and for causing a direct ray in alinement With the distinctive zones, a pointer located between the chart and the screen for masking the light rays projectedfrom the chart and to center the direct ray to give a neutral indication when a load moves the chart to a predetermined position and to permit said direct rayV to be projected into one or the other of said distinctive zones when the normal vposition of the chart is moved therefrom in either direction, and adjustable means for limiting the extent of movement of the Weighing mechanism;

8. In a scale, the combination With Weighing mechanism, of a screen, a chart having a Weight scale thereon and an opening therethrough in alinement With a predetermined scale line, a device intermediate the chart and the screen for centering a normal scale line and for permitting a direct ray to pass through said opening into either one or the other of said distinctive zones when the normal Weight is exceeded or diminished, and adjustable means for limiting the extent of movement of the `Weighing mechanism.

FRED B. HAMBLIN. 

